[size=150]Na figura está representado um paralelogramo [ABCD] e assinalados alguns ângulos.[/size]
[size=100]Altera a posição dos vértices A, B e D e verifica com atenção ao que acontece aos ângulo internos do paralelogramo. [br]De seguida, recorrendo à figura responde às seguintes questões.[/size]
1. O que podemos concluir em relação ao valor de [img]data:image/png;base64,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[/img]?
[size=150]2. O que podemos concluir em relação ao valor de [img]data:image/png;base64,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[/img], [img]data:image/png;base64,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[/img] e [img]data:image/png;base64,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[/img]?[/size]
3. O que podemos concluir quanto à soma das amplitudes de dois ângulos consecutivos do paralelogramo?
[size=150]4. O que podemos concluir em relação aos ângulos opostos de um paralelogramo?[/size]
Passa para o caderno e completa as as seguintes propriedades do paralelogramo:[br][br][b]Propriedade 1[/b]: A soma de dois ângulos consecutivos do paralelogramo é ______________.[br][br][b]Propriedade 2[/b]: Num paralelogramo, ângulos opostos têm ________________________ amplitude.